upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/arch/powerpc/include/asm/arch-mpc83xx/gpio.h

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/* SPDX-License-Identifier: GPL-2.0+ */
#ifndef _MPC83XX_GPIO_H_
#define _MPC83XX_GPIO_H_
/*
* The MCP83xx's 1-2 GPIO controllers each with 32 bits.
*/
#if defined(CONFIG_MPC8313) || defined(CONFIG_MPC8308) || \
defined(CONFIG_MPC8315)
#define MPC83XX_GPIO_CTRLRS 1
#elif defined(CONFIG_MPC834x) || defined(CONFIG_MPC837x)
#define MPC83XX_GPIO_CTRLRS 2
#else
#define MPC83XX_GPIO_CTRLRS 0
#endif
#define MAX_NUM_GPIOS (32 * MPC83XX_GPIO_CTRLRS)
void mpc83xx_gpio_init_f(void);
void mpc83xx_gpio_init_r(void);
#endif /* MPC83XX_GPIO_H_ */